Summary of Introduction to Substantive Criminal Law
Introduction to Substantive Criminal Law for Students
Introduction
Criminal liability depends on two core components: the mental state (mens rea) and the physical act (actus reus). This guide explains levels of mens rea and the different ways people can be parties to a crime. It breaks concepts into digestible parts, gives examples, and compares related ideas so you can remember and apply them.
Mens Rea: Levels of Criminal Intent
Mens rea means the guilty mind or mental state required for criminal liability. Different crimes require different mental states.
Specific intent
Specific intent: a conscious decision to bring about a prohibited consequence, regardless of whether the actor desires that precise result.
- Required for serious offences like murder, burglary, and robbery.
- The prosecution must prove the defendant intended the prohibited result.
Example: A person plans and enters a house at night intending to take valuables — this is burglary because of the specific intent to steal.
Subjective recklessness
Subjective recklessness: deliberately taking an unjustified risk while being aware of that risk.
- Higher-level fault than negligence.
- The defendant actually foresaw the risk and decided to act anyway.
Example: Driving while intoxicated and causing injury. The driver did not intend to hurt anyone but knew there was a risk of doing so and drove regardless.
Objective recklessness (Negligence)
Objective recklessness / negligence: failing to meet the standard of care a reasonable person would in the same circumstances.
- The defendant did not necessarily foresee the risk but an ordinary person would have and would have acted differently.
- Often applies to caretakers or professionals who breach duties.
Example: A caretaker fails to supervise a child properly and the child is injured; this can be criminal negligence if the conduct grossly departs from reasonable standards.
Strict / Absolute Liability
Strict liability: liability that does not require proof of mens rea for the offence; guilt is based on committing the prohibited act alone.
- Typical for regulatory or public-welfare offences (pollution, selling alcohol to minors, selling contaminated food).
- Usually punished by fines rather than imprisonment, though statutes vary.
Example: Selling alcohol to someone under 18 may be an offence even if the seller reasonably believed the buyer was of age.
Comparing Levels of Fault
| Level | Requires proof of defendant's awareness? | Typical consequences | Example |
|---|---|---|---|
| Specific intent | Yes — intention to cause result | Serious crimes (murder, robbery) | Planning and committing a theft |
| Subjective recklessness | Yes — actual foresight of risk | Serious or mid-level crimes | Drunk driving causing injury |
| Objective recklessness / Negligence | No — judged by reasonable person standard | Varies; can be criminal negligence | Caretaker fails duties, child injured |
| Strict/Absolute Liability | No mens rea required | Usually fines, regulatory penalties | Selling contaminated food |
Parties to a Crime (Who can be held liable?)
The law distinguishes participants by how they contribute to the crime. Terms differ between jurisdictions, but the roles are conceptually similar.
Principal and accomplice
- Principal: The main actor who actually commits the criminal act.
- Accomplice (spolupáchateľ): Someone who intentionally helps another person commit a crime.
Accomplice: a person who intentionally aids or assists another in committing an offence, knowing the other intends to commit it.
Requirements to prove accomplice liability:
- The accomplice knew the principal would commit a crime.
- The accomplice intended to help the crime succeed.
Example: In a bank robbery, the person inside demanding money is the principal; the person who drives the getaway car is an accomplice if they intended to assist the robbery.
Specialized terms (common-law origins)
- Principal in the first degree: Th
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Criminal Liability & Parties
Klíčové pojmy: Mens rea is the required mental state for criminal liability., Specific intent requires a conscious decision to achieve a prohibited result., Subjective recklessness means actually foreseeing and taking a risk., Objective recklessness (negligence) is judged by the reasonable person standard., Strict liability requires no mens rea; guilt for the act alone can suffice., Principals are the main actors who commit the crime., Accomplices intentionally assist and must know and intend to help the principal., Principal in the first degree commits the act; second degree aids and may be present., Accessory before the fact helps in advance but is absent from the scene., Proof of intent differentiates accomplice liability from innocent assistance.